using System;
using System.Collections.Generic;

class Program
{
    static void Main(string[] args)
    {
        var histogram = new Dictionary<string, int>{{"ABC", 0}, {"ACB", 0}, {"BAC", 0}, {"BCA", 0}, {"CAB", 0}, {"CBA", 0}};
            
        for(int i = 0; i < 3; i++)
            for(int j = 0; j < 3; j++)
                for(int k =0; k < 3; k++)
                {
                    var sc = new SwappableChars("ABC");
                    sc.Swap(0, i); sc.Swap(1, j); sc.Swap(2, k);
                    histogram[sc.ToString()] += 1;
                }

        foreach (var x in histogram) Console.WriteLine("{0}: {1}", x.Key, x.Value);
    }
}

public class SwappableChars
{
    private char[] mChars;

    public SwappableChars(string text)
    {
        mChars = text.ToCharArray();
    }

    public void Swap(int i, int j)
    {
        var hoge = mChars[i];
        mChars[i] = mChars[j];
        mChars[j] = hoge;
    }

    public override string ToString()
    {
        return new string(mChars);
    }
}